Let x represent the number of song downloads and let y represent the total cost
y=0.95x+70
Using substitution:
first you have to express one variable in terms of the other, in this we can express y in terms of x:

Since both expressions are equal to y, you have to equal both expressions like this:

Now you can solve the equation:

Knowing x=10, you can use any of the expressions we found before to find y. In this case I'm going to use y= -x+9 because it's simpler but boy should give you the same result

So, the answer is x=10 and y=-1
The answer would be 150
To solve this do 50x30 and you would get 150
Answer:
$1124.86
Step-by-step explanation:
if wrong will give points back with brainlyest
if right can i get brainlyest
Answer: B) 115 pounds
Step-by-step explanation:
Because x is the number of days passed, after 21 days, x = 21.

Hope it helps <3